Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 254 of 669
Port 1
OK
: State of West port is ok.
SF
: State of West port is Signal Fail.
Transmit APS
The transmitted APS according to the State Transition Tables in G.8032. Signal Fail (SF) is declared
when ETH trail signal fail condition is detected. No Request (NR) is declared when there are no
outstanding conditions (e.g., SF, SF DNF BPR1, NR BPR0, etc.) on the node. See Rec. ITU-T
G.8031/Y.1342 for details.
Port 0 Receive APS
The received APS for Port 0 according to State Transition Tables in G.8032.
Port 1 Receive APS
The received APS for Port 1 according to State Transition Tables in G.8032.
WTR Remaining
The remaining WTR (Wait to Restore) timeout in milliseconds.
RPL Un-blocked
APS is received on the working flow. Displays a green LED (
) for Up or a red LED (
) for Down.
No APS Received
RAPS PDU is not received from the other end. Displays a green LED (
) for Up or a red LED (
) for
Down.
Port 0 Block Status
Block status for Port 0 (Both traffic and R-APS block status). The R-APS channel is never blocked on
sub-rings without virtual channel enabled.
Blocked
: the status for Port 0 (both traffic and R-APS block status) is ‘blocked’.
Unblocked
: the status for Port 0 (both traffic and R-APS block status) is ‘unblocked’.
Port 1 Block Status
Block status for Port 1 (Both traffic and R-APS block status). The R-APS channel is never blocked on
sub-rings without virtual channel enabled.
Blocked
: the status for Port 1 (both traffic and R-APS block status) is ‘blocked’.
Unblocked
: the status for Port 1 (both traffic and R-APS block status) is ‘unblocked’.
FOP Alarm
Displays the Failure of Protocol Defect (FOP) status. If FOP is detected, the red LED (
) displays in
the table; the green LED (
) displays if FOP is not detected.
Due to errors in provisioning, the ERP Control Process may detect a combination of conditions which
should not occur during "normal" conditions. To warn of such an event, a Failure of Protocol –
Provisioning Mismatch (FOP-PM) is defined. The FOP-PM defect, detected if the RPL Owner Node
receives one or more No Request R-APS messages with the RPL Blocked status flag set (NR, RB),
and a Node ID that differs from its own. The ERP Control Process must notify the equipment fault
management process when it detects such a defect condition, and will continue its operation as well
as possible. This is only an overview of the defect condition. The associated defect and its details are
defined in ITU-T G.8021 as amended by ITU-T G.8021 Amd.1 and Amd.2. Other than alarm noting
the defect condition, the ERP state machine continues operation as well as possible.
